I think you're right about the killing it bit - but I don't think it is the class 1 - it's more likely to be the 6 months in the classroom and the 14 exams £5.5K (ker-ching) + £10K for CPL (ker-ching) and £8000 for the instructor course (ker-ching again). I don't think it's unreasonable for very low hours (i.e. pre solo) students to expect a high medical standard from their instructor - after all they might as well be on the ground if they can't fly the plane for you